Mars closest approach 7/31/2018

Here's mars at closest approach for the 2018 opposition:

Mars 7/31/18 8:21 UTC

Visually it looked like a bright orange disk with poles visible.  seeing was not great, but Cassini was easily resolved on Saturn, so assuming the lack of contrast/detail is the dust storm.  

An IR filter cut thru the dust bringing out more detail on the face:

Mars 7/31/18 8:21 UTC IR

Lastly, here's the RGB color with IR applied as luminance:

Mars 7/31/18 8:21 UTC IR-RGB

For reference, here are the individual color channels.  note the high contrast polar caps in the blue:

red

green

blue

Image details:
7/31/18 08:07-08:35 UTC
celestron 11" Edge HD
televue 2x barlow
ZWO ASI 290MM
ZWO RGB filters, Baader IR pass "685" nm
2x120 second captures each filter, 200 FPS
gain 351, exposure ~1 ms (3 ms blue), 30% histogram
firecapture, autostakkert, winjupos, maxim, photoshop
elevation 30 degrees
Eastbluff
Southern California